Question

Which of the following occurs during meiosis -I but not during mitosis?
a. The chromatids of each chromosome are separated.
b. Synapsis and crossing-over occurs.
c. The nuclear envelope breaks down.​

Answer 1

b. Synapsis and crossing-over occurs is the correct answer.

• Mitosis and meiosis are the two methods of replication of cells. Former is called equational devision while latter is called reducational division.
• Synapsis formation and crossing over occurs only during meiosis, because the method takes place only in sex cells.
• The crossing over helps in creation of variation.
• The phases of division occur once in mitosis while twice in meiosis.